Related Clues:

• Use the unleaded part
• Demagnetize, maybe
• Rub out with rubber, e.g.
• Use the unsharpened end
• Record silence over
• Render ineffective
• Edit, in a way
• Hit 'back'
• Formally withdraw
• Presidential privilege
• Clean the slate
• Press the backspace
• Go back a step, in word processing
• Put back the way things were
• Reverse an action